This was a 100% charge. (I've never used the 80% charge option.)
I've found that even with a recent 100% charge, reconnecting the Leaf & Blink will start a fresh charge cycle that consumes quite a bit of power before determining the battery is, again, fully charged. (This happens whenever the Blink hits Midnight on one of the All Day schedules, thanks to a bug.)
This data comes from the ANSI optical data port on SDG&E's GE utility meter.
I take this data to be 'absolute' in that it is, exactly, what I will see on my power bill.
The meter runs 1.4% higher (in kWh) than the number reported on the Blink Network Dashboard.
The duration of the 'trickle' consumption at the end seems to vary. I've seen cycles with none at all -- just a straight drop to zero at the end. I don't know what is responsible for this.